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树中的“来自子项的边缘”

tag-icon • tag-icon tikz-trees
树中的“来自子项的边缘”

我有一棵如下所示的树：

\documentclass[border=2pt,multi,tikz]{standalone}
\usetikzlibrary{trees,arrows}
\begin{document}

    \begin{tikzpicture}[edge from parent/.style={draw,-latex}]
    \node [draw=none] (q0) {$q_r$}
    child {node [draw=none] (q2) {$q_0$}
            child {node [draw=none] (q4) {$q_1$}
                child {node [draw=none] (q7) {$q_4$}
                    child {node [draw=none] (q10) {$q_s$}}
                      }
                child {node [draw=none] (q8) {$q_5$}
                    child {node [draw=none] (q10) {$q_s$}}
                      }
                  edge from parent [->] node [left] {$\sigma_1$}
                  }
            child {node [draw=none] (q5) {$q_2$}
                child {node [draw=none] (q10) {$q_s$}}
                  }
            child {node [draw=none] (q5) {$q_3$}
                child {node [draw=none] (q10) {$q_s$}}
                  }
          };
    \node[] at (-0.70,-3) {$\times$};
    \node[] at (0.70,-3) {$\times$};
    \node[] at (-1.5,-4.45) {$\times$};
    \end{tikzpicture}
\end{document}

我需要的是标记所有边缘，并设置所有边缘方向从子节点到父节点。我尝试更改，edge from parent但edge from child没有成功。

答案1

  • 反转边缘方向使用edge from parent/.style={draw,latex-}

无关：

  • 所有节点的选项[draw=none]都是多余的
  • 节点$\times$可以集成到树中child {node {$\times$} edge from parent[draw=none]}

在此处输入图片描述

姆韦：

\documentclass[border=2pt,multi,tikz]{standalone}
\usetikzlibrary{trees,arrows}

\begin{document}
\begin{tikzpicture}[
edge from parent/.style={draw,latex-},
sibling distance = 9mm,
                    ]
\node (q0) {$q_r$}
child {node (q2) {$q_0$}
        child {node (q4) {$q_1$}
            child {node (q7) {$q_4$}
                child   {node (q10) {$q_s$} edge from parent node[left]{$\gamma_1$}
                        } edge from parent node[left]{$\delta_1$}
                  }
            child {node {$\times$} edge from parent[draw=none]}
            child {node (q8) {$q_5$}
                child   {node (q10) {$q_s$} edge from parent node[right]{$\gamma_2$}
                        }   edge from parent node[right]{$\delta_2$}
                  } edge from parent node[left]{$\sigma_1$}
              }
        child {node {$\times$} edge from parent[draw=none]}
        child {node  (q5) {$q_2$}
            child   {node  (q10) {$q_s$} edge from parent node[right]{$\delta_3$}
                    } edge from parent node[left]{$\sigma_2$}
              }
        child {node {$\times$} edge from parent[draw=none]}
        child   { node (q5) {$q_3$}
            child   {node (q10) {$q_s$} edge from parent node[right]{$\delta_4$}
                } edge from parent node[right]{$\sigma_3$}
              }
       edge from parent node[right] {$\sigma_0$}
      };
\end{tikzpicture}
\end{document}

编辑： 用于标记边edge from parent node [<where>] {<label>}。用于标记父节点和子节点之间的边，应将其放置在子节点之后。参见上文改进的 mwe

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